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Air cross grids for mammography and methods for their manufacture and use

  • US 5,729,585 A
  • Filed: 12/06/1996
  • Issued: 03/17/1998
  • Est. Priority Date: 05/09/1995
  • Status: Expired due to Term
First Claim
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1. A method for imparting edgewise translation movement to an air cross grid panel having two large pluralities of partition walls extending in substantially transverse respective directions and forming large pluralities of open passages extending through the grid panel, for absorbing scattered secondary radiation in an X-ray mammography exposure procedure, including the steps of:

  • positioning the grid panel with one plurality of partition walls oriented at an acute angle to the direction of said translation movement, said angle being selected to have a tangent constituting a ratio between two integers, each integer being less than 20;

    moving said grid panel in said edgewise translation direction during the entire X-ray exposure at a uniform velocity selected to assure that an integral number of partition walls in both transverse pluralities of walls will pass each point in the image during the entire time of the X-ray exposure.

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